Hole sealing method suitable for thermal spraying coating

The invention discloses a hole sealing method suitable for a thermal spraying coating, which comprises the following steps: placing a coating part to be subjected to hole sealing in a closed container, adding a hole sealing agent into the closed container, and filling the whole closed container with the hole sealing agent, the closed container is controlled to be in a negative pressure state so that the hole sealing agent can flow into holes in the coating; the closed container is communicated with the atmosphere, and the pressure in the closed container is recovered to normal pressure; pressurizing the inside of the closed container from the top of the closed container, and maintaining the pressure; the hole sealing agent in the closed container is discharged, the coating component is cleaned, and the coating component is taken out and aired; then the hole sealing agent in the coating part is subjected to remelting operation, so that alloy powder in the hole sealing agent is solidified after being remelted,